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(No Model.) H H SATER HARRUW.

UNITED STATES PATENT OFFICE.

HANS H. SATER, OF MADISON, WISCONSIN.

HARROW.

SPECIFICATION forming part of Letters Patent No. 503,166, dated August 15, 1893.

Application filed March 25, 1893.

To a/ZZ whom it may concerns Be it known that I, HANS H. SATER, a citi zen of the United States, residing at Madison, in the county of Dane and State of Wisconsin, have invented certain new and useful Improvements in Harrows, of Which the following is a specification.

My invention relates to narrows, and comprises a novely method and means ot' mounting and supporting the teeth thereof.

In the drawings,-Figure lis a perspective view of a portion of my improved harrow; Fig. 2, a vertical transverse sectional view of the same; Fig. 3, a top plan view; and Fig. 4, a horizontal sectional view on the line .fr-:n of Fig. 2.

A indicates the tooth-bar and B the teeth carried thereby. The tooth-bar is VZ-shaped in cross section as shown in Figs. l and 2, and is provided in its upper ange a with a series of holes b of a form and size corresponding to the cross section of the teeth, as shown in Figs. 3 and 4. In the present instance the teeth are represented as being square in crosssection, but this is not essential,-most any other form being equally applicable.

It will be noticed upon reference to Figs. 2 and 4, that each tooth is provided with a reduced neck c which, when the tooth is in proper position, is within the hole in the bar A. Where the tooth is rectangular in cross section this neck may be conveniently formed by cutting away the edges of the tooth for a distance equal to the thickness of flange a, as shown in Figs. 2 and 4,--thereby forming shoulders d at the upper and lower ends of the neck portion c.

In order to insert the tooth it is only necessary to bring its external faces into line with the Walls of the hole b, and then drop the tooth down through the hole until the neck or reduced portion c cornes within the hole. Then, by giving the tooth an eighth of a turn axially, the shoulders d d above and below the neck will be brought to project onto the solid part of ange a both on the upper and lower faces of the latter, as clearly shown in Figs. 2, 3, and 4, thereby preventing the tooth from moving longitudinally through the hole. In order to prevent the tooth from turning back axially, I provide a Serial No. L67,550. (No model.)

clip C which engages or which may encircle the tooth and which is also secured to the lower flange c of the beam or bar by a bolt f or other fastening.

To release the tooth it is first necessary to unfasten the clip O, whereupon the tooth being free to turn axially, may be brought into line or made to register with the hole b through whichit may now be withdrawn.

There is no vertical thrust or strain thrown upon the clip C, all of such strain being taken up bythe shoulders d formed on the tooth and embracing the beam or bar. The clip serves merely to prevent the tooth from turning axially in the beam or bar.

Having thus described my invention, what I claim isl. In a harrow, the combination with a Z- shaped tooth-beam or bar, of a tooth carried by the upper flange of said beam, and a clip secured to the lower flange and engaging the tooth.

2. In a harrow, the colnbination with a tooth-beam or bar having a hole b, of a tooth mounted in said hole and provided with a reduced neck c and with shoulders d at the upper and lower ends of the neck to embrace the beam, and a clip for holding the tooth.

3. In a harrow, the combination with a tooth-beam or bar having ahole b; of a tooth having a reduced neck and of a form above and below the neck corresponding with the hole and means for holding the tooth against turning; said reduced neck being of a height equal to the thickness of the metal through which it passes, substantially as shown and described.

4. In a harrow, the combination with a tooth-beam or bar having a square hole b; of an angular tooth B provided with a reduced neck c and shoulders d; and a clip C secured to the bar and engaging the tooth; said shoulders engaging the upper and lower faces of the beam or bar.

5. In combination with a tooth-beam or bar; a tooth adapted to move lengthwise and to turn axially within the said hole; shoulders on said tooth for preventing longitudinal movement of the tooth up or down; and means for preventing the turning of the tooth.

6. In combination with a tooth-beam or bar;

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harrow teeth in their beams, which consists in passing a tooth having a reduced neck, practically through a beam having a hole oorro responding in form to the cross-section of the tooth; then turning the tooth axially; and finally fastening the tooth to preventits turning, all substantially as described.

In witness whereof I hereunto set my hand in the presence of two witnesses.

HANS H. SATER.

Witnesses:

EDWARD F. APPLEBY, W. R. BAGLEY. 

